<template>
    <div>
        <city-header></city-header>
        <city-search :cities="cities"></city-search>
        <city-list 
          :cities="cities" 
          :hot="hotCities"
          :letter="letter"
        ></city-list>
        <!-- 监听Alphabet.vue里的change事件 -->
        <city-alphabet 
        :cities="cities"
        @change="handleLetterChange" 
        ></city-alphabet>
    </div>
</template>

<script>
import axios from 'axios'
import CityHeader from './components/Header'
import CitySearch from './components/Search'
import CityList from './components/List'
import CityAlphabet from './components/Alphabet'
export default {
    name:'City',
    components:{
        CityHeader,
        CitySearch,
        CityList,
        CityAlphabet
    },
    data(){
        return{
            cities:{},//创建存放ABC...的对象
            hotCities:[],//创建一个存放热门城市的数组
            letter:''
        }
    },
    methods:{
        getCityInfo(){
            axios.get('/api/city.json')
              .then(this.handleGetCityInfoSucc)
        },
        handleGetCityInfoSucc(res){
            res=res.data
            if(res.ret && res.data){
                const data=res.data
                this.cities=data.cities
                this.hotCities=data.hotCities
            }
        },
        handleLetterChange(letter){ 
            this.letter=letter
        }

    },
    mounted(){
        this.getCityInfo()
    }
}
</script>

<style lang="stylus" scoped>

</style>